Yr 13 - Thermal Physics (1 of 2) Flashcards
Relationship Between Pressure and Boiling point
Pressure & Boiling point are proportional.
Triple Point of water
Temperature & Pressure where all phases of matter exist at thermal equilibrium.
0.01 β & 0.61KPa
Formula between Celsius and Kelvin
T (K) = π± (β) + 273
Heating
Transfer of energy from a region of higher temperature to one of lower temperature.
Does heat travel?
No, Object A heats Object B.
Does an object have heat?
No, Object A heats object B causing energy to travel from A to B.
Thermal Equilibrium
Where 2 or more regions have same temperature.
- Therefore, no heating occurs
What are Solid, Liquid and gas called?
Phases of matter
What are the 2 fixed points used to determine the Celsius scale?
Freezing and boiling point at one atmospheric pressure.
What are the 2 fixed points used to determine the Absolute temperature scale?
Triple point of water and absolute zero
β³10K = ?
β³10β
What remains constant during a change In phase?
Average Ke (therefore temperature).
How to calculate internal energy?
Sum of Ek + Sum of Ep
Whats the triple point of water?
0.01β
- Where solid, liquid and gas can exist at the same time.
What is the absolute temperature scale?
What is the thermodynamic temperature scale?
Both are the Kelvin scale.
What does thermodynamic equilibrium mean?
No net heating occurs.
What graph do you use to represent phase changes and heating?
Temperature (k) - Internal Energy
What is heating?
Transferring energy from a region of higher temperature to one of lower temperature.
What does βspecificβ mean.
eg: specific heat capacity
Per unit mass
What graph can you use to calculate the specific heat capacity.
Temperature Time
-> E = mc β³π‘
-> P = (mcβ³π‘) / T
->P= mc x grad
(can just do β³π‘ / T as its the same thing)
What is the latent heat when solid -> liquid
Latent heat of fusion
What is the latent heat when liquid -> gas
latent heat of vaporisation
What is latent heat?
Amount of energy per unit mass to change the phase of a substance while at a constant temperature.
